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Page Authority (PA) is a score developed by Moz that predicts how well a specific page will rank on search engine result pages (SERP). Page Authority scores range from one to 100, with higher scores corresponding to a greater ability to rank.

Page Authority (PA) is a score developed by Moz that predicts how well a specific page will rank on search engine result pages (SERP). Page Authority scores range from one to 100, with higher scores corresponding to a greater ability to rank.

Page Authority is based on data from our web index and takes into account dozens of factors. Like Domain Authority, it uses a machine learning model to identify the algorithm that best correlates with rankings across the thousands of SERPs that we predict against, then produces Page Authority scores using that specific calculation.
Because of how Page Authority is calculated (see "Technical definition of Page Authority" below), it's best used as a comparative metric (rather than an absolute, concrete score) when doing research in the search results and determining which pages may have more powerful or important link profiles than others. Because it's a comparative tool, there isn't necessarily a "good" or "bad" Page Authority score.

You can know page authority of any pages via MozBar. Download it and use with your Chrome, anytime you go to a site or a page, you can see its PA & DA

The page authority (pA) was introduced by Moz in 2012, that depends on 100 points score. If your DA and PA low, then you will find it hard to improve rankings. Well, PA and DA cannot be purchased from another high Domain Authority site, instead it needs to put great efforts and needs lots of patience.

Page Authority (PA) is a score developed by Moz that predicts how well a specific page will rank on search engine result pages (SERP). Page Authority scores range from one to 100, with higher scores corresponding to a greater ability to rank.